LG AHBW Series, Руководство по установке

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Wiring and Water Piping for Unit
42 Air-to-Water Heat Pump
General considerations
Followings are should be considered before beginning water circuit connection.
• Service space should be secured.
• Water pipes and connections should be cleaned using water.
• Space for installing external water pump should be provided if internal water pump capacity is
not enough for installation field.
• Never connect electric power while proceeding water charging.
Water piping and water circuit connection
Definition of terms are as follow :
• Water piping : Installing pipes where water is flowing inside the pipe.
• Water circuit connecting : Making connection between the unit and water pipes or between
pipes and pipes. Connecting valves or elbows are, for example, in this category.
Configuration of water circuit is shown in Chapter 3 “General Information”. All connections should be
complied with presented diagram.
While installing water pipes, followings should be considered :
• While inserting or putting water pipes, close the end of the pipe with pipe cap to avoid dust entering.
• When cutting or welding the pipe, always be careful that inner section of the pipe should not be
defective. For example, no weldments or no burrs are found inside the pipe.
• Drain piping should be provided in case of water discharge by the operation of the safety valve.
This situation can be happened when the internal pressure is over 3.0 bar and water inside the
unit will be discharged to drain hose.
• Pipe fittings (e.g. L-shape elbow, T-shape tee, diameter reducer, etc) should be tightened
strongly to be free from water leakage.
• Connected sections should be leakage-proof treatment by applying tefron tape, rubber bushing,
sealant solution, etc.
• Appropriate tools and tooling methods should be applied to prevent mechanical breakage of the connections.
• Operation time of flow valve(e.g. 3way valve or 2way valve) should be less than 90 seconds.
• While supplying water, pressure of supplying water should be 2.0 bar approximately.
• Pipe is insulated to prevent heat loss to external environment and to prevent dew generation on
the surface of the pipe in cooling operation.
Water Piping and Water Circuit Connection
When the water pipes are connected.
It must be tightened the nut with two wrench.
Otherwise pipes can be deformed.